Journal
NANOSCALE
Volume 4, Issue 6, Pages 2130-2133Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr12001a
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Funding
- National Natural Science Foundation of China [61025021, 60936002, 60729308, 50972067, 51072089]
- National Key Projects of Science and Technology [2009ZX02023-001-3]
- Tsinghua National Laboratory for Information Science and Technology (TNList)
- Cross-discipline Foundation
- Beijing NSF [3111002]
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A single-layer graphene film was grown on copper foil by chemical vapor deposition and transferred onto a silicon-pillar-array (SPA) substrate to make a Schottky junction solar cell. The SPA substrate was specifically designed to suppress reflectance and enhance light absorption. The energy conversion efficiency of the prepared graphene/SPA solar cells achieved a maximum of 2.90% with a junction area of 0.09 cm(2). HNO3 was employed to dope the graphene in the solar cells, and the time dependence of HNO3 treatment on the cell performance was studied. Poly(3,4-ethylenedioxythiophene) polystyrenesulfonic acid (PEDOT-PSS) was also introduced in graphene/SPA solar cells by spin coating on top of the graphene film, and its modification on the cell performance was characterized. The results show that both HNO3 and the PEDOT-PSS film could enhance the energy conversion efficiency of graphene/SPA solar cells.
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